Crosshead



1.0. McARTHUR.

CROSSHEAD. APPLICATION FlLED'jULY 11,1919. I 1,348,287. Patented Aug. 3, 1920.

fl 1 5% I Q} ss s s 2 7 9 6 m i w a 8 hi /i sis s JOHN o. McARTI-IUR, or COUNCIL BLUFFS, IOWA.

CROSSHEAD.

Specification 01' Letters Patent.

Application filed July 11, 1919. Serial No. 310,247.

To all whom it may concern:

Be it known that 1, JOHN O. MGARTHUR, a citizen of the United States, residing at Council Bluffs, in the county of Pottawattamie and State of Iowa, have invented cer tain. new and useful Improvements in Crossheads, of which the following is a specification, reference being had therein to the ac companying drawing.

The invention relates to crossheads and has for its object to provide the shoe for a crosshead, wherein as said shoe becomes worn, it will be possible to take up the shoe to prevent lateral movement of the crosshead within the crosshead guides.

A further object is to provide a crosshead shoe made in sections and to dispose between each pair of sections, which engage the edges of the guides, liners, which liners, as the shoe sections become worn and lateral movement develops, may be removed from the space between the sections and placed on the outside of each section, thereby taking up the space caused by the wear and at the same time maintaining the wrist pin bearings in their normal posltions.

lVith the above and other objects in view, the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a side elevation of the crosshead and its guides.

Fig. 2 is a longitudinal sectional view through the crosshead and its guides.

Fig. 3 is a sectional view taken on line 33 of Fig. 1.

Referring to the drawings the numeral 1 designates a conventional form of crosshead guides, preferably of the type used on locomotives, however, it is to be understood that the invention may be applied to any type of crosshead on various kinds of engines. Crosshead guides at the present time have shoes longitudinally slidably engaging, which shoes are formed in one piece; therefore as the shoes become worn there develops what is known as lateral motion. The particular aim of the invention is to eliminate this motion and to provide means whereby the crosshead shoes may be adjusted so that it will not be necessary to throw away a shoe when the same becomes worn. Crosshead shoes 2 are formed in two sections 3, which sections have their outer edges provided with flanges 4: which are adapted "to engage the sides 5 of the cross head guides 1. The horizontal portions 6 of the shoe sections are spaced apart as at 7, and disposed between the adjacent edges of the horizontal portion 6 are a series of liners 8, which liners 8 are adapted to be removed as the flanges 4: become worn and to be placed in the channels 9 on the outer faces of the shoe sections and between the wrist pin plates 10. By this method it will be seen that the flanges will be brought into closer engagement with the sides 5 of the cross head guides, thereby taking up the lateral pila'y caused by the wear on the flanges.

owever, as the liner 8 that has been removed is placed on the outside and in the channels 9 it will be seen that thewrist pin plates 10'will remain in their normal spaced position, thereby allowing the wrist pin 11 to remain in the same bearings 12.

The wrist pin structure and the connecting rod 13 may be of any construction. In

the case of locomotives a piston 14 is connected to the crosshead and is adapted to operate any form of valve-controlled mechanism.

From the above it will be seen that an adjustable crosshead shoe is provided which will eliminate the necessity of destroying the worn shoes and replacing the same with new ones. It will also be seen that the parts are securely clamped together by means of bolts 15 and that the shoes may be easily machined as desired while in a clamped position and then placed within the cross head guides.

Patented Aug. 3, 1920.

The invention having been set forth what I is claimed as new and useful is 1. A crosshead comprising a pairof shoes, each of said shoes being adapted to slidably engage a crosshead guide, said cross head guides engaging channels in said shoes, each shoe comprising two sections, liners disposed between the adjacent edges of the sec tions ofeach shoe, wrist pin plates engaging the outer faces of the sections of each shoe and bolts passing transversely through the sections of each shoe whereby liners may be removed from between the sections and placed between the wrist pin plates and the outer faces of the sections of each shoe when the shoes become worn and lateral movement develops.

2. A cross head comprising a pair of shoes adapted to engage crosshead guides, each shoe being formed in two sections, each section being longitudinally channeled, thereby forming flanges for engaging the sides of the guides, a plurality of liners disposed between the inner faces of each pair of sections forming each shoe, longitudinal channels on the outer faces of each section of the shoes, Wrist pin plates disposed Within said channel and bolts passing transversely through the shoe sections, liners and wrist pin plates, said bolts forming means whereby liners may be removed from between the shoe sections and disposed in the longitudinal channels on the outer faces of said sec: tions, thereby taking up the Wear upon the shoe sections and at the same time maintaining the Wrist pin plates in their normal positions.

In testimony whereof. I hereunto afilx my signature. 7

JOHN O. MOARTHUR. 

